Description

The STREAMS modules vuidm3p, vuidm4p, vuidm5p, vuid2ps2, and vuid3ps2 convert mouse protocols
to Firm events. The Firm event structure is described in <sys/vuid_event.h>. Pushing a STREAMS module does not automatically enable mouse protocol conversion to Firm events. The STREAMS module state is initially set to raw or VUID_NATIVE mode which performs no message processing. You must change the state to VUID_FIRM_EVENT mode to initiate mouse protocol conversion to Firm events. This can be accomplished by the following code:

The remainder of this section describes the processing of STREAMS messages on the read- and write-side.

Read Side Behavior

M_DATA

Incoming messages are queued and converted to Firm events.

M_FLUSH

The read queue of the module is flushed of all its data messages and all data in the record being accumulated are also flushed. The message is passed upstream.

Write Side Behavior

M_IOCTL

Messages sent downstream as a result of an ioctl(2) system
call. The two valid ioctl options processed by the vuidmice modules are VUIDGFORMAT and VUIDSFORMAT.

M_FLUSH

The write queue of the module is flushed of all its data messages and the message is passed downstream.

VUIDGFORMAT

This option returns the current state of the STREAMS module. The state of the vuidmice STREAMS module may either be VUID_NATIVE (no
message processing) or VUID_FIRM_EVENT (convert to Firm events).

VUIDSFORMAT

This option sets the state of the STREAMS module to VUID_FIRM_EVENT. If the state of the STREAMS module is already in VUID_FIRM_EVENT, this option is non-operational. It is not possible to set the state back to VUID_NATIVE once the state becomes VUID_FIRM_EVENT. To disable message processing, pop the STREAMS module out by calling ioctl(fd, 1I_POP, vuid*).

The following wheel support ioctls are defined for PS/2 mouse only:

VUIDGWHEELCOUNT

This ioctl takes a pointer to an integer as argument and sets the value of the integer to the number of wheels available on this device.

VUIDGWHEELINFO

This command returns static information about the wheel that does not change while a device is in use. Currently the only information defined is the wheel orientation which is either VUID_WHEEL_FORMAT_VERTICAL
or VUID_WHEEL_FORMAT_HORIZONTAL.

typedef struct {
int vers;
int id;
int format;
} wheel_info;

The ioctl takes a pointer to "wheel_info" structure with the "vers" set to the current version of the "wheel_info" structure and "id" set to the id of the wheel for which the information is desired.

VUIDSWHEELSTATEVUIDGWHEELSTATE

VUIDSWHEELSTATE sets the state of the wheel to that specified in the stateflags. VUIDGWHEELSTATE returns the current state settings in the stateflags field.

stateflags is an OR'ed set of flag bits. The only flag currently defined is VUID_WHEEL_STATE_ENABLED.

When stateflags is set to VUID_WHEEL_STATE_ENABLED the module converts motion of the specified wheel into VUID events and sends those up stream.

Wheel events are disabled by default.

Applications that want to change a flag should first get the current flags and then change only the bit they want.